发明名称 |
ULTRASONIC TRANSMITTER AND RECEIVER |
摘要 |
PURPOSE:To provide broad-band characteristics and make possible controlling of directivity by giving notches to one side of a piezoelectric ceramic plate to mesh form at several kinds of wide to narrow spacings leaving part of the other side of the plate thereby forming a multiplicity of electrodes. |
申请公布号 |
JPS52153471(A) |
申请公布日期 |
1977.12.20 |
申请号 |
JP19760069734 |
申请日期 |
1976.06.16 |
申请人 |
OKI ELECTRIC IND CO LTD |
发明人 |
KAMATA HIROSHI;OOGAKI MASAKATSU |
分类号 |
H04R17/00;G01S7/521;G10K11/32 |
主分类号 |
H04R17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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